Why XBT instead of BTC?According to the available sources, CNN Money has put Bitcoin under the category of stocks. It simply means that the digital currency is not associated with any government, but is simply an investment vehicle. According to the International Standards Organization (ISO), if an asset holding value is not backed by a nation, then it starts with an “X”. For instance: Gold is internationally denoted as XAU. The term “XBT” for Bitcoin comes from the same ISO.